Grinding device.



No. 341,541. PATENTED JAN. 15, 1907. A. H. KRAMER.

GRINDING DEVICE.

APPLICATION rum) JUNE 2, 1906.

j noanl'd a Q/vihmaau TED STATES PATENT FFTGE.

Specification of Letters Patent.

Patented Jan. 15, 1907.

Application filed June 2, 1906. Serial No. 319,889.

To ztZZ whom it may concern:

Be it known that I, ALLINoToN KRAMER, a citizen of the United States,residing at Monte Vista, in the county of Rio Grande and State ofColorado, have invented new and useful Improvements in Grinding Devices,of which the following is a specification.

This invention relates to grinding devices, being especially applicableto railway rollingstock for truing the wheels thereof, and has for itsobjects to produce a comparatively simple inexpensive device of thischaracter which may be readily installed for use, one whereby the wheelswill be accurately ground and trued during travel of therailway-vehicle, and one wherein the grinding member may be properly setand will thereafter act to automatically grind away a predeterminedportion of the wheel-tread.

With these and other objects in view the invention comprises the novelfeatures of construction and combination of parts more fully hereinafterdescribed.

In the accompanying drawings, Figure 1 is a side view, partly insection, showing the device applied for action on a car-wheel. Fig. 2 isan end view of the device.

Referring to the drawings, 1 designates an open-ended box or casingsupported by bracket-arms 2, adapted for attachment by fastening membersor bolts 3 to the body of the car, locomotive, or other vehicle having atransporting-wheel 4 to be ground and trued, there being formed on thelower wall of the box 1 a rearwardly-extending portion or plate 5,having an upturned bearing-piece or flange 6.

Slidably disposed in the casing 1 is a grinding member or block 7,preferably composed of emery or other abrasive material and provided atits rear end with a central longitudinal socket 8, having its rear endclosed by means of a plate 9, attached to the body7 and provided with acentral guide-opening 10.

Threaded through the bearing-piece 6 is a setting member or rod 11,provided at its outer end with a crank portion 12 and at its inner endwith a ball-head 13, arranged in the socket 8, the rod being slidablydisposed between its ends in the guide-opening 10, there being formed onthe rod 11 a bearing-piece or collar 14, between which and the body 7there is disposed an expansible spring 15, coiled around the rod 11,which, it will be noted, is, owing to provision of the socket 8,

susceptible of a certain amount of longitudinal movement or playrelative to the body 7.

In practice the device is mounted upon a car, locomotive, or otherrailway-vehicle by attaching the bracket-arms 2 to the vehicle with thedevice positioned for the grinding member 7 to bear on the tread of thewheel. The member 11 is then adjusted for setting the device to grindaway a requisite amount of the wheel for the purpose of truing the same,the setting-rod being in this operation moved inward a distance equalingthe depth of the desired cut to be made, thus to space the head 13 theappropriate distance from the plate 9 for permitting requisite movementof the grinding-head 7 under the action of the spring 15, it beingunderstood that after the wheel has been properly reduced the movementof the grinding member 7 will owing to contact of the plate 9 with head13, be checked, thereby stopping the grinding action. For example, ifthe wheel is to be reduced a quarter of an inch the member 11 is screwedinward until the head 13 is spaced a corresponding distance from theouter wall 9 of the socket and with the forward end of block 7 bearingupon the wheel-tread. As the wheel rotates during travel of the vehiclethe member 7 will perform the grinding action and be pressed to its workby the spring 15, which is partly compressed when the setting member 11is screwed inward, and as soon as the head 13 comes in contact with thewall 9 the movement of block 7 will cease, the wheel in the meantimehaving been properly ground. It will be noted that under thisarrangement the device may be set to effect the desired cut and willwithout further attention properly perform the grinding operation and beautomatically thrown out of action as soon as the predetermined amountof work has been completed.

Having thus described my invention, what I claim is 1. A wheel truingdevice comprising a movable grinding member, means for moving the memberautomatically to its work, and means for setting the member for andstopping the same upon completion of a predetermined movement.

2. A wheeltruing device comprising a movable grinding member, a springfor pressing the member to its work, and means for setting the memberfor and stopping the same upon completion of a predetermined movement.

3. A Wheeltruing device comprising a movable grinding member, means formoving the member automatically to its Work, and a etting elementconnected With and for axial movement relative to the grinding member,said elementand member being provided with cooperative devices forchecking the movement of the member.

4. A Wheel-truing device comprising a rectilineally-movable grindingmember, a support for the member provided with a bearing portion, asetting-rod threaded through ter, and a spring arranged for pressing themember to its Work.

In testimony whereof I aflix. my signature in presence of two Witnesses.

ALLINGTON H. KRAMER.

Witnesses:

JAMES P. VEERKAMP, JOHN G. Brsorrorr.

